Casing-head for oil-wells.



PATENTED SEPT. 1, 1903.

J. GOGHRAN. CASING HEAD FOR OIL WELLS.

urmonxon FILED Mn. so, 1903.

H0 MODEL.

7 lllllllllllllmnun IIIIKHF) UNITED STATES Patented September 1, 1903.

JOHN OOOHRAN, OF BEALLS MILLS, WEST VIRGINIA.

CASING-HEAD FOR OIL-WELLS.

SPECIFICATION forming part of Letters Patent No. 738,001, dated September 1, 1903.

Application filed March 30, 1903.

To all whom it may concern.-

Be it known that I, JoHN COCHRAN, a citizen of the United States, residing at Bealls Mills, in the county of Lewis and State of West Virginia, have invented certain new and useful Improvements in OasingJ-Ieads for Oil-Wells; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Myinvention relates to casing-heads for oil or other wells; and the object of my invention is to makeasimple,cheap,and effective casinghead provided with easily-operated means for accurately controlling the flow of the oil or other fluid through said head.

With this object in view my invention consists of the construction and combination of parts, as hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a perspective view of my improved casinghead, the tubing-ring being removed. Fig. 2 is a cross-section of the same, and Fig. 3 is a detail view showing the means for preventing leakage.

Ct represents the body of the casing-head, provided with a screw-thread b for attachment to the well-tube.

c and cl represent branch openings, screwthreaded for the reception of pipes.

e represents the main opening in the upper part of the casing-head, which is partially closed by the tubing-ring f, which is provided with a central aperture g. This tubing-ring is held in position in the casing-head by screws 72. A packing i, of rubber or suitable material, is located in a groove in the casing-head for the purpose of preventing leaking under the tubing-ringf. Preferably this packing projects slightly above the internal flange j of the casing-head when the tubing-ring is removed, so that a tight joint will be provided.

At one side of the casing-head are provided extensions Z0 and Z, within which the cut-off valve m is confined. This valve is in the shape of a fiat plate provided with downwardly-project-ing teeth a, the valve 1% being, in fact, a wide rack. To operate this valve, a pinion 0, provided with teeth 19, is provided which pinion is located in a recess q in the casing head. The pinion is operated by means of a hand-wheel 1', located on the shaft Serial No. 150,237. (No model.)

.5- thereon, which shaft projects outside of the casing-head. A hollow projecting piece If, provided with beveled-0E portions, so that it may be turned by a wrench, is screwed into the side of the casing-head, within which projection the shaft 5 is located. On this projection is a not a, which is screw-threaded on the outer part of said projection, and a packing is preferably used between said nut and said projection to prevent leakage. valve m being wholly contained within the casing-head and this valve, as well as the pinion 0, being provided with long teeth or gears, renders the valve capable of easy operation without leakage, thus permitting an accurate adjustment of the same, so that the flow of the oil may be easily and efficiently regulated. As this valve moves at right angles to the flow of the oil, the pressure of the oil tends to hold it tightly against the upper portion of the casing-head, thus holding the valve in any adjusted position without any specific means for so doing.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

The combination of a casing-head composed of two separate parts the one fitting above the other, said parts being fastened together, both of said parts being provided with a vertically-arranged perforation, and the lower of said parts being cut away for the passage of a rack, and the upper part fitting over the lower part so as to leave a recess into which said rack may slide, with a perforated tube-ring secured in the upper part of said casing-head, screws securing said tube-ring-in place, a packing between said tube-ring and the upper part of said casinghead, a rack mounted between the parts of said casing-head, said rack being provided with downwardly-extending teeth, a toothed pinion mounted in a recess in the lower part of said casing-head and engaging with said rack, a hand-wheel for operating said pinion, and means for preventing the oil from leaking out around the shaft of said pinion, sub- The 

